As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SEA - FLIGHT 2439 - AFTER TAKEOFF, THE CREW WAS UNABLE TO GET THE LANDING GEAR TO RETRACT. THE LANDING GEAR FAILS TO RETRACT CHECKLIST WAS COMPLIED WITH BUT THE GEAR STILL WOULD NOT RETRACT. MAINTENANCE INSPECTED THE AIRCRAFT AND FOUND THE NOSE LANDING GEAR WOW NR 2 HARNESS BROKEN. THE HARNESS WAS REPLACED AND OPERATIONAL CHECKS WERE GOOD. THE AIRCRAFT WAS RETURNED TO SERVICE.